Load Cube

• Simplex Load Banks utilize UL rated, industry leading "Powr-Web" load elements specifically designed for load banks.


• The "Powr-Web" elements are conservatively operated at half the maximum temperature rating of the alloy and features a short-circuit-safe design based on continuous mechanical support of the resistor by high temperature, ceramic clad stainless steel rods.


• "Powr-Webs" are assembled into discrete trays which are inserted into a vertical "stack." Each tray in the "stack" is independently serviceable without disturbing adjacent trays.

The Simplex inductive Load Banks consist of discrete iron-core load elements. These are non-saturable, air gap calibrated, air cooled devices and are field replaceable. Standard elements have a temperature sensor embedded in the windings to detect element overheating and through the module malfunction detection system, disconnect the load elements and activate an alarm. Standard elements are varnish coated; epoxy coatings are available for severe environments.

Specifications

Tolerance: 5%

Maximum Harmonic Distortion: 1%

Power Factor: .05

Insulation: 220°C

Cooling: Air

The load of a Resistive Load Bank consists of a dense array of open, uninsulated power resistors mounted within a cooling air stream. Since the elements are electrically live, it is possible for a foreign object to penetrate the element array and create a short circuit of adjacent elements or a short to ground.

Since the elements are densely packed, it is possible for a short circuit, once started, to rapidly propagate through the entire element array. As a Load Bank represents a relatively large amount of power concentrated within a relatively small volume, a self-propagating, cascading short circuit would have catastrophic results.

Simplex virtually eliminates the dangers of short circuit through the use of branch circuit fuse protection of the load elements. Per NEC 110-10, protective devices shall clear a fault without "extensive damage" to the circuit components.

A Simplex Load Bank is divided into branch circuits of not more than 50 KW each.